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Finding the Fourth Proportional to 1,578.69, 2,370.06 and 993.87

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Solution

The fourth proportional to 1,578.69, 2,370.06 and 993.87 is: 1,492.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.69 : 2,370.06 = 993.87 : x
  2. Step 2: Convert to fraction form
    1,578.69/2,370.06 = 993.87/x
  3. Step 3: Cross multiply
    1,578.69x = 2,370.06 × 993.87
  4. Step 4: Simplify right side
    1,578.69x = 2,355,531.53
  5. Step 5: Solve for x
    x = 2,355,531.53/1,578.69
  6. Step 6: Final answer
    x = 1,492.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.